How do I use multiple if conditions in JavaScript?

We can also write multiple conditions inside a single if statement with the help of the logical operators && and | | . The && operators will evaluate if one condition AND another is true. Both must be true before the code in the code block will execute.

Which of the following is an if statement in JavaScript?

In JavaScript we have the following conditional statements: Use if to specify a block of code to be executed, if a specified condition is true. Use else to specify a block of code to be executed, if the same condition is false. Use else if to specify a new condition to test, if the first condition is false.

What does == and === mean in JavaScript?

== === = in JavaScript is used for assigning values to a variable. == in JavaScript is used for comparing two variables, but it ignores the datatype of variable. === is used for comparing two variables, but this operator also checks datatype and compares two values.

Why do we use if…else statements in JavaScript?

It is used to decide whether a certain statement or block of statements will be executed or not i.e if a certain condition is true then a block of statement is executed otherwise not.

How do you optimize if else in JavaScript?

5 Tips to Write Better Conditionals in JavaScript

1. Use Array. includes for Multiple Criteria.
2. Less Nesting, Return Early. Let’s expand the previous example to include two more conditions:
3. Use Default Function Parameters and Destructuring.
4. Favor Map / Object Literal than Switch Statement.
5. Use Array.

What is inequality in JavaScript?

Syntax

Description. The inequality operator checks whether its operands are not equal. For details of the comparison algorithm,see the page for the equality operator.

Examples

Specifications

Browser compatibility. Inequality ( a != b)

See also

What is not equal to in JavaScript?

Not equal is an comparison operator which is used to check the value of two operands are equal or not. If the value of two operands are not equal it returns true. The symbolic representation of Not equal operator in JavaScript is !=.

What is if statement in JavaScript?

The JavaScript If Statement is one of the most useful decision-making statements in real time programming. It allows the compiler to test the condition first and then, depending upon the result it will execute the statements.